Led light apparatus with adjustable characteristic

ABSTRACT

A light apparatus has a white set of LED modules and non-white set of LED modules. A control circuit is used for indicating an operation mode selected from at least a first mode and a second mode. In the first mode, the white set of LED modules are used for mixing a first output light and the in the second mode, the non-white set of LED modules are used for mixing a second output light. A wireless circuit may be used for receiving an external command to control the light apparatus.

RELATED APPLICATION

This application claims priority of a provisional application No.62/793,847.

FIELD

The present invention is related to a light apparatus and moreparticularly related to a LED light apparatus with adjustablecharacteristic.

BACKGROUND

When the LED technology keeps advancing, more types of LED light devicesare developed and designed. There is always a strong need to find aconvenient, low cost and flexible light apparatus for improving humanlife.

SUMMARY OF INVENTION

In some embodiments, a light apparatus includes a white set of LED(Light Emitted Diode) modules and a non-white set of LED modules. Thewhite set of LED modules may include two or more than two LED modules.Each LED module may have one or more than one LED component, e.g. apackaged LED IC covered with fluorescent layer for emitting a light whenreceiving a driving current. There are more than two types of LEDmodules that emit different white lights, e.g. with different colortemperatures, in the white set of LED modules.

The non-white set of LED modules may include two or more than two LEDmodules. Each LED module may have one or more than one LED component,e.g. a packaged LED IC covered with fluorescent layer for emitting alight when receiving a driving current. There are more than two types ofLED modules that emit different lights, e.g. with different colors, inthe non-white set of LED modules.

For example, the white set of LED modules has a first LED module and asecond LED module. The first LED module emits a first light with a firstcolor temperature and the second LED module emits a second light with asecond color temperature. The first color temperature is different fromthe second color temperature. For example, the first LED module may emita light with similar spectrum as sunrise white light, and the second LEDmodule may emit a light with similar spectrum as noon white light.

For example, the non-white set of LED modules includes a third LEDmodule and a fourth LED module. The third LED module emits a third lightwith a third color and the fourth LED module emits a fourth light with afourth color. The third color is different from the fourth color. Theremay be a fifth LED module so that the third LED module, the fourth LEDmodule and the fifth LED module emit red color, blue color and greencolor, respectively. By adjusting light strengths of non-white set ofLED modules, a desired color may be mixed.

The light apparatus also has a control circuit for indicating anoperation mode selected from at least a first mode and a second mode.The control circuit, for example, may be a digital circuit or integratedwith a mechanic device for storing a status. Users may adjust a manualswitch, operate a remote control for setting or adjusting the controlcircuit for indicating a different operation mode that may be selectedfrom a first mode, a second mode and/or other modes.

A driver module is connected to the control circuit for selectivelysupplying currents to the first LED module, the second LED module, thethird LED module, and the fourth LED module according to the operationmode. The driver module may include a current source, a PWM powercircuit or other driver circuit types, for converting 110V or 220V AC tocorresponding DC currents supplying to drive the white set of LEDmodules and the non-white set of LED modules. There may be multiplesub-modules in the driver module respectively for each LED module or forthe white set and the for the non-white set of LED modules,respectively.

In the first mode, the first LED module and the second LED module areactivated and the third LED module and the fourth LED module aredeactivated for mixing a first output light using the first LED moduleand the second LED module. For example, no current is supplied to thenon-white set of LED modules in the first mode. The first LED module andthe second LED module are supplied with different currents to obtaindifferent first output lights with different color temperatures.

In the second mode, the first LED and the second LED module aredeactivated and the third LED module and the fourth LED module areactivated for mixing a second output light using the third LED moduleand the fourth LED module. For example, the first LED module and thesecond LED module are turned off. The third LED module, the fourth LEDmodule and maybe other LED module in the non-white set of LED modulesare turned on to mix a desired color.

In some embodiments, the first output light is adjusted to a differentcolor temperature by adjusting light strengths of the first LED moduleand the second LED module.

In some embodiments, the different color temperature of the first outputlight is obtained by changing a first current ratio of currentssupplying to the first LED module and the second LED module.

In some embodiments, the different color temperature of the first outputlight is obtained by changing duty ratios of the first LED module andthe second LED light module. In PWM power supplying, there is a dutyratio, the turned-on to turned-off ratio in a quickly repeated cycle, inPWM current supply. By adjusting the duty ratio, the overall outputlight strength is obtained. By adjusting the relative duty ratio betweenthe first LED module and the second LED module, a different colortemperature may be mixed.

In some embodiments, the first LED module and the second LED module emitlights simulating black body radiation spectrums corresponding todifferent sun light times. Black body radiation spectrum is used inPhysics, for indicating light characteristics similar to sun lightfeatures.

In some embodiments, the non-white set of LED modules also includes afifth LED module. The third LED module emits a red light, the fourth LEDmodule emits a green light and the fifth LED module emits a blue light.The second output light is adjusted to have different colors by changinga output ratio of the third LED module, the fourth LED module and thefifth LED module.

In some embodiments, there is a wireless circuit connected to thecontrol circuit for choosing the operation mode from the first mode andthe second mode. The wireless circuit may implement Wi-Fi, Bluetooth, orother wireless protocols for receiving and/or transmitting signals to anexternal device like a mobile phone or a remote control.

In some embodiments, the wireless circuit also receives an externalcommand for adjusting the first output light and the second outputlight. The external command may indicate a desired color temperature, adesired color, or a overall light strength for a luminance level.

In some embodiments, there is a manual switch manually operated by auser for indicating the control circuit to choose the operation modefrom the first mode and the second mode. For example, the manual switchmay be installed on a wall, on a back side of the light apparatus, on aremote control or on other places for users to operate for setting thelight apparatus. The manual switch may be a button, a rotating switch, atouch panel, a jumper switch or other forms. The control circuit mayreceive the status of the manual switch and translate the status tochoose a corresponding operation mode or other parameters.

For example, a light bulb as an example may be disposed with a manualswitch near its bulb cap. Users may buy the same light bulb but switchthe manual switch to set the output light of the light bulb to a desiredcolor temperature or a desired color. This may decrease the storage inthe store and users may even change the setting when they want to do so.Such mechanism may also be applied to down light, panel light, spotlight or other light devices.

In some embodiments, the manual switch is concealed from direct usertouch after installation of the light apparatus.

In some embodiments, the driver circuit has a shared current circuit forsupplying a driving current to either the white set of LED modules orthe non-white set of LED modules. As mentioned above, since the whiteset of LED module and the non-white set of LED modules may be set notturning on at the same time, there may be a shared current sourcesupplying a common current source either supplying to the white set ofLED modules or the non-white set of LED modules. In other words, in suchdesign, there may be two sets of LED modules, but there may be only oneset of driver circuit. Since the cost of LED modules are decreasing, theoverall value of such design keeps increasing.

In some embodiments, the shared circuit switches the driving current toeither the white set of LED modules or the non-white set of LED modulesbased on the operation mode.

In some embodiments, the driver module adjusts the first output light bychanging duty ratios of the first LED module and the second LED modulevia PWM power supplying.

In some embodiments, the driver module adjusts the second output lightby changing current ratios of the third LED module and the fourth LEDmodule.

In some embodiments, the driver module activates both the white set ofLED modules and the non-white set of LED modules in a third mode forgenerating a third output light.

In some embodiments, the driver module activates both the white set ofLED modules and the non-white set of LED modules in a third mode forgenerating a third output light.

In some embodiments, a mixed color of the third output light is changedby adjusting the non-white set of LED modules.

In some embodiments, a mixed color temperature of the third output lightis changed by adjusting the white set of LED modules.

In some embodiments, the white set of LED modules and the non-white setof LED modules are placed in an alternating mixed manner. Specifically,there may be multiple LED modules in the white set of LED modules andthe non-white set of LED modules. To mix a better output light, themultiple LED modules may be disposed in an alternating mixed manner,e.g. different types of LED modules are placed next to each other whilethe same types of LED modules are distributed evenly on a light sourceplate.

In addition, since the first mode and the second mode determine that thewhite set of LED modules and the non-white set of LED modules are notturned on at the same time, one LED module of the white set of LEDmodules may be placed adjacent to one LED module of the non-white set ofLED modules for achieving better heat dissipation, i.e. heat notaccumulated at the same place.

In some embodiments, the control circuit switches to the first mode orthe second mode when the white set of LED modules or the non-white setof LED modules are damaged.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a light apparatus embodiment, showing components with across-sectional view.

FIG. 2 shows another aspect of FIG. 1.

FIG. 3 shows a top view of FIG. 1.

FIG. 4 is a first example of circuit diagram in an embodiment.

FIG. 5 is a second example of circuit diagram in an embodiment.

DETAILED DESCRIPTION

This invention implements following concept in various light bulbs,downlight light, spot lights, any luminous devices and/or electronicdevices with light components. LED (Light Emitted Diode) modules, notlimited, are preferred in following embodiments.

In an embodiment, a light apparatus includes a white set of LED modulesand a non-white set of LED modules. The white set of LED modules includemultiple LED modules with more than one type of optical characteristic.For example, the white set of LED modules has a first LED module with afirst color temperature that is close to sunrise sunshine. In addition,the white set of LED modules also has a second LED module with a secondcolor temperature that is close to noon time sunshine. Both the firstLED module and the second LED module are “white” LED modules althoughthey may have different color temperatures.

The non-white set of LED modules may include LED modules with multiplecolors that are not white. For example, the LED modules in the non-whiteLED set may emit red light, blue light or green light.

The LED modules in the white set of LED modules or the non-white set ofLED modules may contain the same LED chips, e.g. blue light LED chips,covered with different fluorescent layers for converting the originallight of the LED chips to desired optical characteristic, e.g. whitelights with different color temperatures, red light, green light or bluelight.

The light apparatus includes a driver circuit for providing a drivingcurrent supplying to the white set of LED modules and the non-white setof LED modules. The driver circuit may supply different current tochange emitted light strengths of the white set of LED modules and thenon-white set of LED modules to blend a mixed overall light of the LEDlight apparatus. For example, the LED modules of different colortemperatures in the white set of LED modules receive different currentsto adjust overall color temperature of the white set of LED modules. Inthe example mentioned above, the first LED module may receive a 0.05 Acurrent and the second LED module may receive a 0.50 A current. Theoverall color temperature would appear with a 1 to 10 ratio between thecolor temperatures of the first LED module and second LED module. Bychanging the current ratio, the overall color temperature may beadjusted to a desired value dynamically. In addition to change thecurrent, the overall mixed light optical characteristic may also beadjusted by other techniques like adjusting duty ratio of the LEDmodule.

In an embodiment, the white set of LED modules and the non-white set ofLED modules are categorized into two groups operated in separate modesrespectively. Specifically, in such embodiment, the white set of LEDmodules and the non-white set of LED modules are not operated at thesame time for mixing a desired optical characteristic.

For example, the light apparatus may have a first mode and a secondmode. In the first mode, the white set of LED modules are turned onwhile the non-white LED modules are turned off. In the first mode, theLED modules with different color temperatures or other opticalcharacteristic may be adjusted respectively to mix a desired colortemperature or other optical characteristic as mentioned above. In thesecond mode, the non-white set of LED modules are turned on, and the LEDmodules in the non-white set of LED modules are adjusted separately formixing a desired color or other optical characteristic. In other words,in such embodiments, the white set of LED modules are not used togetherwith the non-white set of LED modules for mixing a desired opticalcharacteristic. The light apparatus has the white set of LED modules andthe non-white set of LED modules at the same time, but the two sets ofLED modules are not combined for mixing a desired opticalcharacteristic.

In a white light mode (the first mode mentioned above), the output whitelight is generated by one or more white LEDs. The white LEDs (the whiteset of LED modules) can have different color temperatures so that theuser can adjust to a specific color temperature by mixing the differentwhite LEDs. None of the R, G, and B LEDs (the non-white set of LEDmodules) emit light in the white light mode. In other words, the whiteoutput light is generated by only mixing light from different whiteLEDs, not by using any R or G or B LEDs. In one embodiment, Ra8 of thewhite light mode is always lower than 85.

In a color light mode (the second mode mentioned above), the outputcolor light is generated only by mixing the R, G, and B LEDs. None ofthe white LEDs emit light in the color light mode. That is, the outputcolor light is generated only by mixing light from the R, G, B LEDs, notby using any of the white LEDs.

Thus, in this case, the whites LEDs and the R, G, B LEDs do not emitlight simultaneously.

Please refer to FIG. 1, FIG. 2 and FIG. 3, which illustrate an lightbulb example implementing the concept mentioned above.

In FIG. 1, a light bulb, as a light apparatus, includes a bulb shell101, a bulb body housing 107. There is a plugging terminal 1071 insertedto a bottom of the bulb body housing 107. A heat sink component 105 likea metal cup is attached for bringing heat of a light source plate 104 tothe bulb body housing 107.

There is a driver circuit board enclosed by the bulb body housing 107.The driver circuit is connected to the plugging terminal 1071 and thecap terminal 103 for receiving an external power source. The drivercircuit board is mounted with a driver circuit 109 and a wirelesscircuit 108. The driver circuit 109 generates one or multiple drivingcurrents by converting the external power source, like 110V or 220Valternating current source.

The wireless circuit 108 is used for receiving and/or sending a statusto an external device like a mobile phone or a remote control. Thecommands from the external device may indicate the driver circuit 109 tochange current or duty ratio to a white set of LED components and anon-white set of LED components.

The light source plate 104 mounted with the LED modules has a pluggablesocket 106 for receiving a pin of the driver circuit board for supplyingelectricity to the LED modules on the light source plate 104. By usingthe pluggable socket 106, welding may be replaced with an easierassembling structure. The wireless circuit 108 may implement one ormultiple wireless protocols like Wi-Fi, Bluetooth, Zigbee, Z-wave and anantenna 102 is protruding upwardly for transmitting and/or receivingsignal for the wireless circuit 108. 1

In FIG. 2, the bulb shell has an elastic hook 110 to be connected to thebulb body housing, which may strengthen the structure of the lightapparatus.

In FIG. 3, there is a white set of LED modules and a non-white set ofLED modules. The white set of LED modules include a first white LEDmodule 114 and a second white LED module 115. The first white LED module114 and the second white LED module 115 are both white LED modules buthave different color temperatures. As mentioned above, in a first mode,the first white LED module 114 and the second white LED module 115 maybe adjusted for mixing a desired color temperature.

The non-white set of LED modules has a red LED module 111, a green LEDmodule 112, a blue LED module 113. By adjusting current or duty ratio ofthe red LED module 111, the green LED module 112 and the blue LED module113, the light apparatus may emit different light colors in the secondmode.

In FIG. 4, an illustrative circuit diagram is provided for explaininghow to implement the driver circuit.

In FIG. 4, the driver circuit has a bridge circuit 201 for filtering anAC current. A DC to AC converter 202 is used for generating a stable DCcurrent supplying to a wireless circuit 2062 and a driver chip 203. Thewireless circuit 2062 is connected to an antenna 2061 for receiving anexternal command. The driver chip 203 receives the DC current may becontrolled by a manual switch, a default setting, or the externalcommand received by the wireless circuit 2062 for generating separatedriving currents respectively to a white set of LED components 205 and anon-white set of LED components 204. The white set of LED components 205may have a first white LED component 2051 and a second white LEDcomponent 2052 with different color temperatures. The non-white set ofLED components 204 may include a red LED component 2041, a green LEDcomponent 2042, a blue LED component 2043.

There are multiple ways to implement the circuit. For example, FIG. 5illustrate another circuit design.

In FIG. 5, the bridge circuit 301 filters an AC current. There are twoAC-DC converters 302, 303 respectively supplying power to a white set ofLED components 304 and a non-white set of LED components 305. Thewireless circuit 306 receives signals from an antenna 307. The signalsmay include an external command for changing the currents of the AC-DCconverters 302, 303 for changing color temperatures or colors asmentioned above in the first mode or the second mode.

In some embodiments, a light apparatus includes a white set of LED(Light Emitted Diode) modules and a non-white set of LED modules. Thewhite set of LED modules may include two or more than two LED modules.Each LED module may have one or more than one LED component, e.g. apackaged LED IC covered with fluorescent layer for emitting a light whenreceiving a driving current. There are more than two types of LEDmodules that emit different white lights, e.g. with different colortemperatures, in the white set of LED modules.

The non-white set of LED modules may include two or more than two LEDmodules. Each LED module may have one or more than one LED component,e.g. a packaged LED IC covered with fluorescent layer for emitting alight when receiving a driving current. There are more than two types ofLED modules that emit different lights, e.g. with different colors, inthe non-white set of LED modules.

For example, the white set of LED modules has a first LED module and asecond LED module. The first LED module emits a first light with a firstcolor temperature and the second LED module emits a second light with asecond color temperature. The first color temperature is different fromthe second color temperature. For example, the first LED module may emita light with similar spectrum as sunrise white light, and the second LEDmodule may emit a light with similar spectrum as noon white light.

For example, the non-white set of LED modules includes a third LEDmodule and a fourth LED module. The third LED module emits a third lightwith a third color and the fourth LED module emits a fourth light with afourth color. The third color is different from the fourth color. Theremay be a fifth LED module so that the third LED module, the fourth LEDmodule and the fifth LED module emit red color, blue color and greencolor, respectively. By adjusting light strengths of non-white set ofLED modules, a desired color may be mixed.

The light apparatus also has a control circuit for indicating anoperation mode selected from at least a first mode and a second mode.The control circuit, for example, may be a digital circuit or integratedwith a mechanic device for storing a status. Users may adjust a manualswitch, operate a remote control for setting or adjusting the controlcircuit for indicating a different operation mode that may be selectedfrom a first mode, a second mode and/or other modes.

A driver module is connected to the control circuit for selectivelysupplying currents to the first LED module, the second LED module, thethird LED module, and the fourth LED module according to the operationmode. The driver module may include a current source, a PWM powercircuit or other driver circuit types, for converting 110V or 220V AC tocorresponding DC currents supplying to drive the white set of LEDmodules and the non-white set of LED modules. There may be multiplesub-modules in the driver module respectively for each LED module or forthe white set and the for the non-white set of LED modules,respectively.

In the first mode, the first LED module and the second LED module areactivated and the third LED module and the fourth LED module aredeactivated for mixing a first output light using the first LED moduleand the second LED module. For example, no current is supplied to thenon-white set of LED modules in the first mode. The first LED module andthe second LED module are supplied with different currents to obtaindifferent first output lights with different color temperatures.

In the second mode, the first LED and the second LED module aredeactivated and the third LED module and the fourth LED module areactivated for mixing a second output light using the third LED moduleand the fourth LED module. For example, the first LED module and thesecond LED module are turned off. The third LED module, the fourth LEDmodule and maybe other LED module in the non-white set of LED modulesare turned on to mix a desired color.

In some embodiments, the first output light is adjusted to a differentcolor temperature by adjusting light strengths of the first LED moduleand the second LED module.

In some embodiments, the different color temperature of the first outputlight is obtained by changing a first current ratio of currentssupplying to the first LED module and the second LED module.

In some embodiments, the different color temperature of the first outputlight is obtained by changing duty ratios of the first LED module andthe second LED light module. In PWM power supplying, there is a dutyratio, the turned-on to turned-off ratio in a quickly repeated cycle, inPWM current supply. By adjusting the duty ratio, the overall outputlight strength is obtained. By adjusting the relative duty ratio betweenthe first LED module and the second LED module, a different colortemperature may be mixed.

In some embodiments, the first LED module and the second LED module emitlights simulating black body radiation spectrums corresponding todifferent sun light times. Black body radiation spectrum is used inPhysics, for indicating light characteristics similar to sun lightfeatures.

In some embodiments, the non-white set of LED modules also includes afifth LED module. The third LED module emits a red light, the fourth LEDmodule emits a green light and the fifth LED module emits a blue light.The second output light is adjusted to have different colors by changinga output ratio of the third LED module, the fourth LED module and thefifth LED module.

In some embodiments, there is a wireless circuit connected to thecontrol circuit for choosing the operation mode from the first mode andthe second mode. The wireless circuit may implement Wi-Fi, Bluetooth, orother wireless protocols for receiving and/or transmitting signals to anexternal device like a mobile phone or a remote control.

In some embodiments, the wireless circuit also receives an externalcommand for adjusting the first output light and the second outputlight. The external command may indicate a desired color temperature, adesired color, or a overall light strength for a luminance level.

In some embodiments, there is a manual switch manually operated by auser for indicating the control circuit to choose the operation modefrom the first mode and the second mode. For example, the manual switchmay be installed on a wall, on a back side of the light apparatus, on aremote control or on other places for users to operate for setting thelight apparatus. The manual switch may be a button, a rotating switch, atouch panel, a jumper switch or other forms. The control circuit mayreceive the status of the manual switch and translate the status tochoose a corresponding operation mode or other parameters.

For example, a light bulb as an example may be disposed with a manualswitch near its bulb cap. Users may buy the same light bulb but switchthe manual switch to set the output light of the light bulb to a desiredcolor temperature or a desired color. This may decrease the storage inthe store and users may even change the setting when they want to do so.Such mechanism may also be applied to down light, panel light, spotlight or other light devices.

In some embodiments, the manual switch is concealed from direct usertouch after installation of the light apparatus.

In some embodiments, the driver circuit has a shared current circuit forsupplying a driving current to either the white set of LED modules orthe non-white set of LED modules. As mentioned above, since the whiteset of LED module and the non-white set of LED modules may be set notturning on at the same time, there may be a shared current sourcesupplying a common current source either supplying to the white set ofLED modules or the non-white set of LED modules. In other words, in suchdesign, there may be two sets of LED modules, but there may be only oneset of driver circuit. Since the cost of LED modules are decreasing, theoverall value of such design keeps increasing.

In some embodiments, the shared circuit switches the driving current toeither the white set of LED modules or the non-white set of LED modulesbased on the operation mode.

In some embodiments, the driver module adjusts the first output light bychanging duty ratios of the first LED module and the second LED modulevia PWM power supplying.

In some embodiments, the driver module adjusts the second output lightby changing current ratios of the third LED module and the fourth LEDmodule.

In some embodiments, the driver module activates both the white set ofLED modules and the non-white set of LED modules in a third mode forgenerating a third output light.

In some embodiments, the driver module activates both the white set ofLED modules and the non-white set of LED modules in a third mode forgenerating a third output light.

In some embodiments, a mixed color of the third output light is changedby adjusting the non-white set of LED modules.

In some embodiments, a mixed color temperature of the third output lightis changed by adjusting the white set of LED modules.

In some embodiments, the white set of LED modules and the non-white setof LED modules are placed in an alternating mixed manner. Specifically,there may be multiple LED modules in the white set of LED modules andthe non-white set of LED modules. To mix a better output light, themultiple LED modules may be disposed in an alternating mixed manner,e.g. different types of LED modules are placed next to each other whilethe same types of LED modules are distributed evenly on a light sourceplate.

In addition, since the first mode and the second mode determine that thewhite set of LED modules and the non-white set of LED modules are notturned on at the same time, one LED module of the white set of LEDmodules may be placed adjacent to one LED module of the non-white set ofLED modules for achieving better heat dissipation, i.e. heat notaccumulated at the same place.

In some embodiments, the control circuit switches to the first mode orthe second mode when the white set of LED modules or the non-white setof LED modules are damaged.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. However, theillustrative discussions above are not intended to be exhaustive or tolimit the invention to the precise forms disclosed. Many modificationsand variations are possible in view of the above teachings. Theembodiments were chosen and described in order to best explain theprinciples of the techniques and their practical applications. Othersskilled in the art are thereby enabled to best utilize the techniquesand various embodiments with various modifications as are suited to theparticular use contemplated.

Although the disclosure and examples have been fully described withreference to the accompanying drawings, it is to be noted that variouschanges and modifications will become apparent to those skilled in theart. Such changes and modifications are to be understood as beingincluded within the scope of the disclosure and examples as defined bythe claims.

1. A light apparatus, comprising: a white set of LED modules comprisinga first LED module and a second LED module, wherein the first LED moduleemits a first light with a first color temperature and the second LEDmodule emits a second light with a second color temperature, the firstcolor temperature is different from the second color temperature; anon-white set of LED modules comprising a third LED module and a fourthLED module, wherein the third LED module emits a third light with athird color and the fourth LED module emits a fourth light with a fourthcolor, the third color is different from the fourth color; a controlcircuit for indicating an operation mode selected from at least a firstmode and a second mode, the operation modes of the first mode and thesecond mode being chosen from a remote control; and a driver moduleconnected to the control circuit for selectively supplying currents tothe first LED module, the second LED module, the third LED module, andthe fourth LED module according to the operation mode, wherein the firstLED module and the second LED module are activated and the third LEDmodule and the fourth LED module are deactivated in the first mode formixing a first output white light with a desired color temperature byadjusting a relative ratio between the first LED module and the secondLED module, and the first LED and the second LED module are deactivatedand the third LED module and the fourth LED module are activated in thesecond mode for mixing a second output light of a desired color bymixing the third color and the fourth color using the third LED moduleand the fourth LED module.
 2. The light apparatus of claim 1, whereinthe first output light is adjusted to a different color temperature byadjusting light strengths of the first LED module and the second LEDmodule.
 3. The light apparatus of claim 2, wherein the different colortemperature of the first output light is obtained by changing a firstcurrent ratio of currents supplying to the first LED module and thesecond LED module.
 4. The light apparatus of claim 2, wherein thedifferent color temperature of the first output light is obtained bychanging duty ratios of the first LED module and the second LED lightmodule.
 5. The light apparatus of claim 1, wherein the first LED moduleand the second LED module emit lights simulating black body radiationspectrums corresponding to different sun light times.
 6. The lightapparatus of claim 1, wherein the non-white set of LED modules alsocomprises a fifth LED module, the third LED module emits a red light,the fourth LED module emits a green light and the fifth LED module emitsa blue light, the second output light is adjusted to have differentcolors by changing a output ratio of the third LED module, the fourthLED module and the fifth LED module.
 7. The light apparatus of claim 1,further comprising a wireless circuit connected to the control circuitfor choosing the operation mode from the first mode and the second mode.8. The light apparatus of claim 7, wherein the wireless circuit alsoreceives an external command for adjusting the first output light andthe second output light.
 9. The light apparatus of claim 1, furthercomprising a manual switch manually operated by a user for indicatingthe control circuit to choose the operation mode from the first mode andthe second mode.
 10. The light apparatus of claim 9, wherein the manualswitch is concealed from direct user touch after installation of thelight apparatus.
 11. The light apparatus of claim 1, wherein the drivercircuit has a shared current circuit for supplying a driving current toeither the white set of LED modules or the non-white set of LED modules.12. The light apparatus of claim 11, wherein the shared circuit switchesthe driving current to either the white set of LED modules or thenon-white set of LED modules based on the operation mode.
 13. The lightapparatus of claim 1, wherein the driver module adjusts the first outputlight by changing duty ratios of the first LED module and the second LEDmodule via PWM power supplying.
 14. The light apparatus of claim 1,wherein the driver module adjusts the second output light by changingcurrent ratios of the third LED module and the fourth LED module. 15.The light apparatus of claim 1, wherein the driver module activates boththe white set of LED modules and the non-white set of LED modules in athird mode for generating a third output light.
 16. The light apparatusof claim 15, wherein the driver module activates both the white set ofLED modules and the non-white set of LED modules in a third mode forgenerating a third output light.
 17. The light apparatus of claim 16,wherein a mixed color of the third output light is changed by adjustingthe non-white set of LED modules.
 18. The light apparatus of claim 16,wherein a mixed color temperature of the third output light is changedby adjusting the white set of LED modules.
 19. The light apparatus ofclaim 1, wherein the white set of LED modules and the non-white set ofLED modules are placed in an alternating mixed manner.
 20. The lightapparatus of claim 1, wherein the control circuit switches to the firstmode or the second mode when the white set of LED modules or thenon-white set of LED modules are damaged.